Page 22
Sub-section - 4.05
ABNORMAL PROCEDURES
FAA Approved
Original Issue: Feb 28, 2006
Hawker 850XP Pro Line 21 Airplane Flight Manual
FLIGHT DECK HEAT VALVE STUCK OPEN
Air Conditioning Noise and Warm Incoming Air with F/DK VLV Selected CLOSE
F/DECK AIR VLV circuit breaker................................ Check (DA-D, E2)
F/DK VLV .................................................................. OPEN then CLOSE
If Flight Deck Valve Remains Open
MAIN AIR VLV 2 .........................................................LP ON
MAIN AIR VALVE NOT IN SELECTED POSITION
Airplane In Flight
MAIN AIR VLV circuit breaker (affected side).............Check (DA-D, E1 & F1)
MAIN AIR VLV (affected side) ....................................CLOSE then OPEN
If Warning Recurs -
MAIN AIR VLV (affected side) ...................................CLOSE
Airplane On Ground
Annunciator will illuminate whenever the MAIN AIR VLV is OPEN.
FAILURE TO PRESSURIZE
DUMP VALVE.............................................................Check SHUT
If DUMP VALVE was found to be open
Wait for approximately 1 minute to make sure pressurization is operable.
If DUMP VALVE was found to be closed
PRESSN switch..........................................................OVRD
If pressurization remains inoperative
Altitude .......................................................................Remain below 15,000 ft but not
below the minimum safe altitude.
If pressurization is regained
Continue flight at pilot’s discretion.
VALVE 1
MAIN AIR
VALVE 2
MAIN AIR
or
For Training Purposes Only